Waveform generator



FIG. 1 is a perspective view of a waveform generator;

FIG. 2 is a front elevation view of the waveform generator;

FIG. 3 is a left side elevation view of the waveform generator;

FIG. 4 is a right side elevation view of the waveform generator;

FIG. 5 is a top plan view of the waveform generator;

FIG. 6 is a bottom plan view of the waveform generator; and,

FIG. 7 is a rear elevation view of the waveform generator. 

The ornamental design of a waveform generator, as shown and described. 